don? >> reporter: ann, the cause of the fire is still unknown but firefighters do know where the fire broke out. a very bad place between two wooden buildings and a row of wooden buildings and by the time firefighters got here the buildings were burning pretty hot. now we have some video provided by kpix 5 viewer and let's take a look. as you can see, the fire burned hot, fast and sent up quite a bit of smoke. firefighters quickly called in a second alarm. then a third alarm. and then spent two and a half hours battling to get it all under control. now there are about three residential units in the two buildings that burned and shops on the ground floor. isabella hutton was in her shop when the fire broke out. >> we started to hear voices fire fire, so i left. and i see -- flames but we were not this -- i went back and hoping to put everything into the safe. and then was already a knock on the door, out out out. we are under fire. so -- that's it. was when -- [ indiscernible ] right away.